@ GNU AS assembler header file for Joystick
@ Written by DefMod (Dec  9 2012) on Sun Dec  9 15:49:36 2012
@ Jonathan Coxhead, jonathan@doves.demon.co.uk, 18 May 1995

@ OSLib---efficient, type-safe, transparent, extensible,
@ register-safe API coverage of RISC OS
@ 
@ Copyright (c) 1994-2012 Jonathan Coxhead and OSLib maintainers
@ 
@ Licence:
@ 
@    OSLib is free software; you can redistribute it and/or modify
@ it under the terms of the GNU General Public License as published by
@ the Free Software Foundation; either version 1, or (at your option)
@ any later version - and this with the following clarification and
@ special exception:
@ 
@    Linking this library statically or dynamically with other modules
@ is making a combined work based on this library. Thus, the terms
@ and conditions of the GNU General Public License cover the whole
@ combination.
@ 
@    As a special exception, the copyright holders of this library
@ give you permission to link this library with independent modules
@ to produce an executable, regardless of the license terms of these
@ independent modules, and to copy and distribute the resulting
@ executable under terms of your choice, provided that you also meet,
@ for each linked independent module, the terms and conditions of the
@ license of that module. An independent module is a module which is
@ not derived from or based on this library. If you modify this
@ library, you may extend this exception to your version of the library,
@ but you are not obliged to do so. If you do not wish to do so, delete
@ this exception statement from your version.
@ 
@    OSLib is distributed in the hope that it will be useful,
@ but WITHOUT ANY WARRANTY; without even the implied warranty of
@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
@ GNU General Public License for more details.
@ 
@    You should have received a copy of the GNU General Public License
@ along with this programme; if not, write to the Free Software
@ Foundation, Inc, 675 Mass Ave, Cambridge, MA 02139, USA.

#ifndef Joystick_Hdr
#  define Joystick_Hdr

#  ifndef Get_Types
#    define Get_Types
#    include "oslib/Types.Hdr"
#  endif

#  ifndef Get_OS
#    define Get_OS
#    include "oslib/OS.Hdr"
#  endif

@Symbols for constants
#  define Joystick_X 0xff
#  define Joystick_Y 0xff00
#  define Joystick_Switches 0xff0000
#  define Joystick_XShift 0x0
#  define Joystick_YShift 0x8
#  define Joystick_SwitchesShift 0x10
#  define Joystick_HalfWordX 0xffff
#  define Joystick_HalfWordY 0xffff0000
#  define Joystick_HalfWordXShift 0x0
#  define Joystick_HalfWordYShift 0x10

@Symbols for structure offsets and sizes
        .struct 0
        .skip   Bits
Joystick_State                 : 

        .struct 0
        .skip   Bits
Joystick_HalfWordState         : 


@Symbols for SWI's and SWI reason codes
.set XJoystick_Read,0x63f40
.set Joystick_Read,0x43f40
   @Entry
   @  R0 = joystick_no (Int)
   @Exit
   @  R0 = state (Joystick_State)

.set XJoystick_ReadHalfWord,0x63f40
.set Joystick_ReadHalfWord,0x43f40
   @Entry
   @  R0 = &100 :OR: joystick_no (Int)
   @Exit
   @  R0 = state (Joystick_HalfWordState)
   @  R1 = switches (Bits)

.set XJoystick_CalibrateTopRight,0x63f41
.set Joystick_CalibrateTopRight,0x43f41

.set XJoystick_CalibrateBottomLeft,0x63f42
.set Joystick_CalibrateBottomLeft,0x43f42

#endif
